/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/

#include "itkUnsharpMaskImageFilter.h"
#include "itkTestingMacros.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"


namespace
{
template< typename OutPixelType >
int RunTest( int argc, char* argv[] )
{
  constexpr unsigned int Dimension = 2;
  using InputImagePixelType = unsigned char;

  using InImageType = itk::Image< InputImagePixelType, Dimension >;
  using ReaderType = itk::ImageFileReader< InImageType >;

  typename ReaderType::Pointer reader = ReaderType::New();
  reader->SetFileName( argv[2] );

  TRY_EXPECT_NO_EXCEPTION( reader->Update() );

  using OutImageType = itk::Image< OutPixelType, Dimension>;
  using WriterType = itk::ImageFileWriter< OutImageType >;

  typename WriterType::Pointer writer = WriterType::New();
  writer->SetFileName( argv[3] );

  using FilterType = itk::UnsharpMaskImageFilter< InImageType, OutImageType >;
  typename FilterType::Pointer filter = FilterType::New();

  //this does not work from within a templated method (GCC gives an error)
  //EXERCISE_BASIC_OBJECT_METHODS(filter, UnsharpMaskImageFilter, ImageToImageFilter);

  filter->SetInput( reader->GetOutput() );

  if( argc > 4 )
    {
    filter->SetAmount( std::stod( argv[4] ) );
    }
  if( argc > 5 )
    {
    filter->SetSigma( std::stod( argv[5] ) );
    }
  if( argc > 6 )
    {
    filter->SetThreshold( std::stod( argv[6] ) );
    }

  bool clamp = itk::NumericTraits< typename FilterType::OutputPixelType >::IsInteger;
  filter->SetClamp( clamp );
  TEST_SET_GET_VALUE( clamp, filter->GetClamp() );

  if( clamp )
    {
    filter->ClampOn();
    TEST_SET_GET_VALUE( true, filter->GetClamp() );
    }
  else
    {
    filter->ClampOff();
    TEST_SET_GET_VALUE( false, filter->GetClamp() );
    }


  TRY_EXPECT_NO_EXCEPTION( filter->Update() );

  writer->SetInput( filter->GetOutput() );

  TRY_EXPECT_NO_EXCEPTION( writer->Update() );

  std::cout << std::endl << "Test PASSED ! " << std::endl;
  return EXIT_SUCCESS;
}
}

int itkUnsharpMaskImageFilterTest( int argc, char* argv[] )
{
  if( argc < 4 )
    {
    std::cerr << "Usage:\n itkUnsharpMaskImageFilterTest";
    std::cerr << " float | uchar in.png out.nrrd [amount [sigma [threshold]]]" << std::endl;
    return EXIT_FAILURE;
    }

  int testStatus = EXIT_SUCCESS;

  if( !strcmp( argv[1], "float" ) )
    {
    testStatus = RunTest< float >( argc, argv );
    }
  else if( !strcmp( argv[1], "uchar" ) )
    {
    testStatus = RunTest< unsigned char >( argc, argv );
    }
  else
    {
    std::cerr << "Error" << std::endl;
    std::cerr << "Unable to run test with " << argv[1];
    std::cerr << " pixel type entered as input argument" << std::endl;
    std::cerr << "Expected float or uchar" << std::endl;
    std::cerr << "TEST FAILED!" << std::endl;
    testStatus = EXIT_FAILURE;
    }

  return testStatus;
}
